Safety stop-motion for jacquard looms



L. S. CANNON.

SAFETY STOP MOTION, FOR JACQUARD LOOMS.

' APPLICATION FILED 00L 5. m6.

1,336,677. Patented Apr. 13, 1920.

3/ 29 3/ 2 SHEETS-SHEET 1- 100/5 5. CANNOM L. S. CANNON.

SAFETY STOP MOTION. FOR JACQUARD LOOMS. APPLICATION FILED, 0e15, 1916.

, 1,336,677, Patented Apr. 13,1920.

2 SHEETSSHEET 2- Daub/ Lou/s CANNO/V,

LOUIS SIMPSON CANNON, OF ROSEMARY, NORTH CAROLINA.

SAFETY STOP-MOTION FOR JACQUARD LOOMS.

Specification of Letters Patent.

Patented Apr. 13, 1920.

Application filed October 5, 1916. Serial No. 123,914.

To all whom 2'25 may concern:

Be it known that I, LOUIS S. CANNON, a citizen of the United States,residing at Rosemary, in the county of Halifax and State of NorthCarolina, have invented certain new and useful Improvements in SafetyStop-Motions for Jacquard Looms, of which the following is aspecification.

This invention relates to stop motion for looms and provides a devicefor. bringing a Jaquard loom to rest in case of any derangement of thepattern cards or card presenting mechanism.

. In a prior Patent No. 1,099,423, granted to myself and John M.Holladay on June 9, 1914, is disclosed a mechanism of this general typein which a normally operative stop mechanism is rendered inoperative ateach pick by the alinement of a control needle or needles withcorresponding holes in each. successive jacquard card. Where suchalinement occurs the needle is, in trade parlance. said to be indicated?While said device operates satisfactorily there is considerable wear dueto the retraction of the stop mechanism at every pick, and the purposeof the present invention is to eliminate this wear and still secure thecharacteristically certain action of the prior device.

Briefly stated, I make use of a normally. inert stop mechanism which isactuated by the jacquard whenever a control needle is forced back, butremains inert so long as the control needle or needles be correctlyindicated by or alined with corresponding holes provided therefor in thesuccessive cards. To accomplish this result I reverse the control hookor hooks, corresponding to the control needles, and provide auxiliarygrifit' blades, upon which they are hooked by the forcing back of aneedle. The control hooks are so connected to the stop mechanism as toactuate it when the control hooks are lifted by the grit? blades. Thisretains the important advantage present in the prior device of havingthe loom run so long as the control needles are correctly alined with orindicated by holes in each successive pattern car A successfulembodiment of the invention is illustrated in the accompanying drawings,in which I Figure 1 is a front elevation of such portions of a singlelift jacquard and a connected loom as are necessary to show theapplication of my invention thereto;

Fig. 2 is a side elevation of the same;

Fig. 3 is a plan view of the shipper-lever and associated mechanism;

Fig. 4 is a perspective view of a griif blade with an auxiliary grifi'blade attached. showing a reversed control hook and also regular hooks;and

Fig. 5 is a perspective view showing the stop mechanism and its relationto the shipper lever.

In the drawings I have purposely omitted in the interests of clearnesspractically all. parts of the jacquard and loom not directly related tothe applied stop mechanism. Such jacquard or loom parts as areillustrated are typical and will serve to illustrate the principle ofattachment of my invention to jacquards and looms varying in detail. InFig. 1 the showing of the needles and hooks is purely diagrammatic.

A portion of the frame of the loom is illustrated at 11, and 12represents the sword mounted on its rock shaft 18. The shipper lever 14has a resilient portion 15 which urges it to the left (as viewed in Fig.1). The upper end of the shipper lever 14 works in a slot 16 in the topplate 17 of frame 11 as seen in Figs. 3 and 5, and this stop 16 has anoffset or notch 18 into which the shipper lever drops and by which it isheld when it is swung to the right. When the shipper lever 14 is forcedout of notch 18 it springs to the left. This movement to the left stopsthe loom by means of any usual connected mechanism suitable for thepurpose. Such mechanisms are common in the art, and accordingly Iillustrate merely the shipper lever as typical of this portion of theloom structure.

To force the lever 14 from notch 18 I make use of a lever mechanismwhich may be actuated by the sword. A bell crank having two arms 19 and20 is mounted in bearings 21 on frame 11. (See Figs. 1, 2, 3 and 5.) Thearm 19 bears against lever 14 so as to force it out of the notch 18. Thearm 20 carries hinged thereto a latch arm 22, which in its loweredposition will be struck by :1 lug 23 on the sword 12 as the sword swingsforward in the action of the loom. As will be observed from thedrawings, the parts are so arranged that under these conditions themovement of the sword will through the action of the latch andbell-crank force the shipper lever 14; from the notch 18 thus causingthe stopping of the loom by the characteristic action of the shipperlever.

The latch 22 is normally held up out of the path of lug 23 by means of aweight 24. This weight 24 is connected to the latch 22 by a cord 25-which passes upward. from the weight, around a guide 26 which may conveniently be located on the compart board 27, and then down to the latch22. The simplest way of dropping the latch into the path of the lug 23is to lift the weight Accordingly ,I connect the weight 24; by means ofa number of leashes 28 to corresponding hooks 29, called control hooks,in the jacquard. Of coursea single leash and single control hook andneedle will suiiice in. some instances but at least two control needlesfor each card are usually desirable and I illustrate the invention soapplied.

The control hooks 29 are the same as the regular or pattern hooks 30 ofthe jacquard except that their upper or hooked ends are turned in theopposite direction so as to coact with small auxiliary griff blades 31on the backs of the regular grid blades, 82. Thus when a control needle33 is forced back by the action of the pattern card presentingmec-.anism, its corresponding hook 29 engages and is lifted by anauxiliary grid 81 and when a control needle is not forced back itscorresponding hook iswholly disengaged from the griif mechanism. This isexactly the reverse of the action of the regular pattern needles andhooks, fora pattern hook 30 is cleared from its grill bar 32 only whenits corresponding pattern needle 34 is forced back.

The needle guide board is shown at 35 and the cylinders are indicated at36. A pattern card chain is shown at 37. The pins 38 are the ordinaryguide pins for the cards. The needles are of course urged toward thecylinder by the usual springs (not shown). 7

For purposes of illustration I have shown the invention applied to asingle lift jacquard having two pattern card chains running in unison onadjacent alined cylinders. It is applicable in similar manner to double7 cylinder, auxiliary cylinder and other jacquards having one or moreneedle banks, one or more control needles being provided in each needlebank and all the cards of each of the various pattern series beingpunched to indicate such control needles.

In double lift j aequards the hooks are arranged'in pairs. Chosen pairsof hooks-may be used for control purposes both hooks of misplaced.

such pairs being reversed from their normal position to coaet withspecial griff blades, such as already described. 7

The invention is applied to existing jacquards by merely reversing thedesired number of hooks and fastening to the backs of the proper grifi'bars small projecting plates to serve as auxiliary griff bars and coactwith the reversed hooks. Similarly the throwout mechanism for theshipper lever is readily applicable to existing looms.

Since the loom will be immediately stop ped by the forcing back of 7 anycontrol needle, the stop operates if the cards overrun or wind aroundthe cylinder, if the cards become misplaced because of loose pegs orworn peg holes or if the cylinder gets out of alinement from any cause.In fact any derangement which can affect the accurate action of thepattern needles will actuate the stop.

The entire stop mechanism remains inert except when the loom is to bestopped, instead of moving every pick. Moreover, only one latch arm 22is required instead of one for each control needle as in the Cannon andHolladay mechanism above referred to.

A clear distinction is to be drawn between the usual pattern hooksand-needles which raise and lower the warp threads in the loom toproduce the shed, and control hooks and needles which as their nameindicates, control the stop mechanism, and bring it into ction when acard of the pattern chain is Having thus described my invention, what Iclaim is 1. A. device for actuating the stop mechanism of a Jacquardloom comprising, in comblnittl011,1 griif; a control hook normallydisengaged from said grill and connected with the stop'mechanism of aloom; and a control needle operable by the ordinary jacquard patterncards for carrying said hook into engagement with said griff when saidneedle is forced back by a misplaced pattern card.

2. In combination with the stop mechanism of a loom, a device foractuating such stop mechanism from a jacquard, including a grid 5 acontrol hook normally disengaged from said griif and connected with thestop mechanism; and a control needle operable by the ordinary jacquardpattern cards for carrying said hook into engagement with said griifwhen said needle is forced back by a misplaced pattern card.

3. In combination with a loom having a stop device, a jacquard sheddingmechanism including a griff having main and supplemental blades facingin reverse directions; pattern hooks normally overhanging the main bladeof the grid; a control hook normally removed from the supplementalblade;needles controlling the pattern hooks; a control needle for the controlhook; connections between the control hook and the stop device; and aseries of pattern cards each perforated to indicate or aline with thepattern needles and the control needle when the cards are correctlypositioned, but serving to move the control needle into engagingrelation with the supplemental blade when any card is incorrectlypositioned.

In combination with the grift of a Jacquard loom, a control hooknormally disengaged from said grifl'; a control needle connected withsaid hook for moving it into engagement with said griff when said control needle is pressed back by a misplaced pattern card; a stop motionfor the loom; connections between said control hook and stop motion foractuating the latter by the lifting of the former; and a pattern cardseries for said acquard, each card of which is provided with a hole toindicate said control needle.

5. In combination with the griif of a Jacquard loom, a control hooknormally disengaged therefrom; a control needle con nected with saidhook for moving the latter into engagement with said grit when saidneedle is pressed back; a stop motion for said loom; a yielding devicenormally hold ing said stop motion inactive; connections between saidcontrol hook and said yielding device whereby the rise of said hook willoverpower said yielding device; and a pat tern card series each card ofwhich is provided with a hole to indicate said control needle.

6. The combination of a loom; a jacquard operatively connected therewithand including the usual pattern hooks and associated needles, griffmechanism for said hooks, and pattern-card presenting mechanism; aspecial grifi a reversed control hook normally free from the griffs; acontrol needle connected with said control hook for moving the latterinto engagement with said special grid when said needle is pressed backby a misplaced pattern card; a loom-stopping mechanism; connectionsbetween said control hook and stopping mechanism for actuating thelatter by the lifting of the former; and a pattern card series presentedby said card presenting mechanism and coacting with all said needles.

7. The combination of a loom; a jacquard operatively connected therewithand includ ing the usual pattern hooks and associated needles, grifl'mechanism for said hooks and pattern-card presenting mechanism; aspecial grifi? a reversed control hook normally free from the griffs; acontrol needle connected with said control hook for moving the latterinto engagement with said special grifi when said needle is pressed backby a mis laced attern card a loom-sto )ing' means; a yielding deviceconnected with said stopping means for holding the same in inactiveposition; connections between said control hook and yielding device forcausing the lifting of the control hook to overpower the yieldingdevice; and a pattern card series presented by said card presentingmechanism and coacting with all said needles.

In testimony whereof I have signed my name to this specification.

LOUIS SIMPSON CANNON.

